3.1 SOURCE & Transfer Path Analysis (TPA)

Table of Contents

Transfer Path Analysis studies the transmission of mechanical vibrations of actively vibrating components to the connected passive structures. This is shown schematically in the next figure, where the nomenclature used at VIBES to describe the different parts of the TPA problem is also enumerated. This table allows you to connect the figures, equations and terms used in this manual with the actual channel types used within SOURCE.

Transfer path problem with (left) a graphical depiction and (right) description of numbers used to denote specific components

LocationDescriptionLocated on
1source excitationsubsystem A
2interfacesinterface A/B
3targetssubsystem B
4indicator vibrations (not shown, used for source characterization)subsystem B (tipically)

Many TPA methods exist and can be divided into three main categories: component-based TPA, classic TPA and transmissibility-based TPA. The first two methods rely on explicit force determination of the source (Source Characterization), while the latter only identifies the dominant path contributions in the assembled product considering only responses. Due to the limited applicability of this method, only classic and component-based TPA are implemented in SOURCE.


For more detailed information of the technology implemented in SOURCE, you are advised to consult the following references:

  • van der Seijs, M., de Klerk, D., Rixen, D.J. General framework for transfer path analysis: history, theory and classification of techniques. Mechanical Systems and Signal Processing. 68–69, 217–244, August 2015. Click here to go to the paper.
  • VIBES.technology. Transfer Path Analysis: Source Characterization. Theory and example cases on modular source descriptions using blocked forces. White Paper. June 2020. Click here to go to the paper.

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